BIOS Setup
AMI230 / AMI231 / AMI232 User Manual
61
4
4.4.9
USB Configuration
BIOS Setting
Description
Legacy USB
Support
Enables Legacy USB support.
•
Auto
disables legacy support if there is no USB
device connected.
•
Disable
keeps USB devices available only for EFI
applications.
XHCI Hand-off
This is a workaround for OSes without XHCI hand-off
support. The XHCI ownership change should be
claimed by XHCI driver.
USB Mass
Storage Driver
Support
Enables / Disables the support for USB mass storage
driver.
USB Transfer
time-out
The time-out value for control, bulk, and Interrupt
transfers.
Options: 1 sec / 5 sec / 10 sec / 20 sec
Device reset time-
out
Seconds of delaying execution of start unit command
to USB mass storage device.
Options: 10 sec / 20 sec / 30 sec / 40 sec
Device power-up
delay
The maximum time the device will take before it
properly reports itself to the Host Controller.
Auto uses default value for a Root port it is 100ms.
But for a Hub port, the delay is taken from Hub
descriptor.
Options: Auto / Manual
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